On the fifth night, some visiting parents asked me to contact a lawyer in order to get their son out of prison. They said a Catholic priest had called to tell them they should get a lawyer or public defender if they wanted to bail their son out! I called the lawyer as requested, and he came the next day to interview the prisoners with a standard set of legal questions, even though he, too, knew it was just an experiment.

At this point it became clear that we had to end the study. We had created an overwhelmingly powerful situation -- a situation in which prisoners were withdrawing and behaving in pathological ways, and in which some of the guards were behaving sadistically. Even the "good" guards felt helpless to intervene, and none of the guards quit while the study was in progress. Indeed, it should be noted that no guard ever came late for his shift, called in sick, left early, or demanded extra pay for overtime work.